This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

France's most famous cemetery, with some of its most curious tombs.

It houses the remains of a 17th-century version of the Titanic.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

A Nesting Doll of Churches.

Pilgrimage site for star-crossed lovers.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Go inside to really appreciate this 500-year-old technological masterpiece.

Jesus' footprints and the first catacombs in the world.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Venice's "Island of the Mad."

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The oldest operating pharmacy in the world features 800-year-old recipes.

2300-year-old Roman road connecting the empire.

Pompeii's less famous neighbor is still revealing her secrets.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The middle finger of modernity.

The underground sanctuary of a mysterious ancient cult.